Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Pacific County, Washington
EPA puts Pacific County in Zone 3, its lowest radon zone, and only 3 radon tests from it are on file with CDC (2020). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Nearest county
10.1%
Thurston County, 49 miles
- Thurston
- 10.1%
- Washington
- 25.5%
Share at 4+ pCi/L, 198 tests, 2008 to 2017
Ground above low
None
52.7 pts below Washington
- Pacific
- 0.0%
- Washington
- 52.7%
Share of land USGS rates moderate or high potential
Tests reported
4
Too few for a share
- Pacific
- 4
- Needed
- 30
2014
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Pacific County
Starts at EPA's action level
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.0 pCi/L
At or above 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher.
The data
Pacific County, At a glance
Pacific County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 97% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Pacific County, 2020
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 0.0% |
| 2015 | 0.0% |
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2019 | 0.0% |
| 2020 | 0.0% |
2020: 0.0%. Across these years the share ran from 0.0% to 0.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 3 tests were reported to CDC for Pacific County over 2020, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Figure above: 2020. Measured data period: 2008 to 2020 (every CDC figure on file).
Pacific County, Compared
Pacific County radon figures, compared
Calculated by Radon411CDC's largest figure for Pacific County rests on 4 tests in 2014, 0 of them at or above 4 pCi/L, so each test moves its share by 25.0 points and no rank or comparison is drawn from it. Results reached as high as 1.7 pCi/L, with a middle value of 1.1 pCi/L.
The nearest counties with a figure are Thurston County (49 miles away) at 10.1%, Cowlitz County (55 miles away) at 11.3% and Clark County (79 miles away) at 25.1%. Pooled across 39 Washington counties, 25.5% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Pend Oreille County reported the highest share (63.2%) and Snohomish County the lowest (2.3%). EPA's 1993 map puts Pacific County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 97% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Pacific County, Geology
The ground under Pacific County
PredictedUSGS's geologic map puts all of Pacific County's mapped land in one class: low radon potential. 97.4% of it lies in the area the map calls Coastal Hills, to which USGS gives a radon index of 6, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Coastal Hills | Cretaceous and Tertiary continental and marine sedimentary rocks and pre-Miocene volcanic rocks. | Low | 6 | 97.4% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Pacific County beside the ground around it
Across Washington 13.7% of the land is rated high; none of Pacific County's is. None of the 3 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Pacific County, Local resources
Radon testing and mitigation in Pacific County
- Radon ProgramRadon Program, run by Washington State Department of Health, offers free or discounted test kits, and answers questions about testing and mitigation in Washington.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
We have a limited supply of free radon test kits.
- Compare kits
- See the Washington directoryNo professionals are listed in Washington yet. The state program can point you to registered testers and mitigators.
What Washington's program says
- Phone
- 360-236-3200
- doh.radon@doh.wa.gov
What it means
Pacific County, Questions
Questions about radon in Pacific County
Are radon levels high in Pacific County?
In 2020, 0.0% of the radon tests reported to CDC for Pacific County, Washington were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.2 pCi/L. Of the 8 nearest counties with a figure, within 140 miles, the share of tests at or above 4 pCi/L runs from 2.3% to 39.7%.
Which counties border Pacific County?
Pacific County borders 3 counties: Wahkiakum County, Grays Harbor County and Lewis County.
Products
Pacific County, Products
Testing a home in Pacific County
No CDC figure names Pacific County; the nearest county with one, Thurston County (49 miles away), reported 10.1% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Pacific County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Monitor
RadonScan-Plus USB-powered radon monitor with Wi-Fi
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Pacific County, Bordering counties
Counties bordering Pacific County
Calculated by Radon411- Radon levels in Grays Harbor CountyEPA zone 3
36.4%at or above 4 pCi/L
Median 1.4 pCi/L · 11 tests
- Radon levels in Lewis CountyEPA zone 3
9.1%at or above 4 pCi/L
Median 0.1 pCi/L · 11 tests
- Radon levels in Wahkiakum CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 2.9 pCi/L · 1 test
Pacific County, Cities and towns
Cities and towns in Pacific County
The Census Bureau estimates 24,357 residents in Pacific County for July 1, 2025, 854 more than in 2020 (+3.6%). That works out to 26 people per square mile of land. No town dominates: Raymond, the largest, has 3,235 residents, 13.3% of the total. Together its 4 incorporated places hold 32.5% of those residents; the other 67.5% live outside any of them. Reported testing is thin here: 4 tests over 2014, or 0.2 for every 1,000 residents (2025 estimate), where Washington as a whole comes to 0.4.
From Raymond to Ilwaco, CDC publishes no figure by town: each reads Pacific County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Raymond | 3,235 | +4.3% | 13.3% |
| South Bend | 1,790 | +2.3% | 7.3% |
| Long Beach | 1,769 | +3.8% | 7.3% |
| Ilwaco | 1,112 | +1.7% | 4.6% |
4 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).
Pacific County, Homes
Homes in Pacific County
Of Pacific County's 16,220 homes, 73% are detached houses, against 62% across Washington; 18% are mobile homes. Half of its homes were built before 1977, close to Washington's 1984: 30% date from before 1960 and 18% from 2000 or later. Owners live in 81% of the occupied homes (Washington: 64%), so for most households a test and a fix are their own to order.
| Homes | Pacific County | Washington |
|---|---|---|
| Housing units | 16,220 | 3,262,667 |
| Detached houses | 73% | 62% |
| In buildings of 5 or more | 6% | 22% |
| Mobile homes | 18% | 6% |
| Built before 1960 | 30% | 21% |
| Built since 2000 | 18% | 28% |
| Middle year built | 1977 | 1984 |
| Owner-occupied | 81% | 64% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.